Supply Basin in Colorado is a state-regulated earth dam completed in 1911 for recreational purposes. Located in Garfield County near Glenwood Springs, this dam on Deep Creek stands at 13 feet high with a hydraulic height of 7 feet. With a storage capacity of 267 acre-feet, Supply Basin covers a surface area of 22 acres and has a maximum discharge of 1600 cubic feet per second.

Despite its low hazard potential, the dam's condition was assessed as fair during the last inspection in July 2019. With a moderate risk assessment score, Supply Basin has an inspection frequency of 6 times per year. The dam features an uncontrolled spillway with a width of 15 feet, and its primary purpose of recreation underscores its importance as a water resource and climate asset in the region. Enthusiasts of water resources and climate issues will find Supply Basin an intriguing structure to study and monitor for its impact on the local environment.